Altman Hanging C-Clamps, often referred to as pipe clamps, are essential tools in theatrical and studio lighting setups. They are used to securely attach lighting fixtures to pipes, battens, or truss systems. The clamps feature a C-shaped frame with a screw mechanism that tightens to hold the fixture in place. Altman offers various models, including the 515 Extruded C-Clamp and the 510 Iron C-Clamp, each designed for specific applications and load capacities.